Typewriter

Details Typewriter Typewriter

1987-12-24

1989-10-03

Burr, Edgar S.

Typewriting machines

Means auxiliary to typewriting function

Means for correcting typing errors

4002401, 400186, 4002161, 400703, 400719, B41J 2900, B41J 1162

Patent

active

048712744

ABSTRACT:
Disclosed is a typewriter wherein a ribbon holder mounted on a carriage movable along a platen holds both a print ribbon and a correction ribbon thereon and is displaceable between its first lift position for facing the print ribbon to a print point on the platen and its second lift position for facing the correction ribbon to said print point.
The disclosed typewriter is provided with lift means for displacing the ribbon holder between its first and second lift position, detecting means for detecting the lift position of the ribbon holder, and control means for controlling the lift means to displace the ribbon holder in response to the result of detection of the detecting means, thereby the possibility of errorneous initial printing is eliminated, which may occur when a power supply is once turned off during a correcting action with a correction ribbon and then is turned on again to perform a normal print operation.

REFERENCES:
patent: 3802939 (1975-05-01), Morelli
patent: 4460287 (1984-07-01), Theilen et al.
patent: 4611938 (1986-09-01), Rettke et al.
patent: 4613248 (1986-09-01), Iwase et al.
patent: 4746235 (1985-05-01), Mueller et al.

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